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Abstract:

A binder management system having a cabinet with shelves for removable
storage of searchable binders. Each binder has a body with front and rear
covers and a spine. Inside the body is a binder mechanism for removably
retaining sheet media. Each binder has externally extending upper and
tower ohmic contact members which ohmically engage conductive members
mounted on the shelf surfaces near the front. Each binder has a binder
identification circuit coupled to an LED mounted on the binder spine in a
location visible when the binder rests on a shelf. When a binder
identification signal from a host computer is presented to the shelf
conductive members it is transferred by the binder contact members to the
binder identification circuit. If the signal matches, the LED is
activated to aid the user in finding the binder. An LED and an optional
audible indicator are mounted on the shelves to further aid the user in
finding the sought binder.

Claims:

1. A searchable binder for use in a binder management system, said binder
comprising: a binder body having a front cover, a rear cover and a spine
joining said front cover and said rear cover; a binder mechanism mounted
in the interior of said binder body; a visible indicator mounted on said
binder body in a position visible from the outside of the binder; first
and second ohmic contact members carried by said binder body and having
contact portions extending partially externally of said binder body for
receiving a binder identification signal from a source; and a binder
identification circuit mounted on said binder body and coupled to said
first and second ohmic contact members and said visible indicator for
activating said visible indicator when a received binder identification
signal designates said binder as a sought binder.

2. The invention of claim 1 wherein said binder mechanism is mounted to
an inner surface of said rear cover.

3. The invention of claim 1 wherein said visible indicator is mounted on
said spine.

4. The invention of claim 1 wherein said spine has an inner surface
terminating in an upper end and a lower end; and wherein first ohmic
contact member is mounted on said inner surface of said spine adjacent
said upper end and said second ohmic contact member is mounted on said
inner surface of said spine adjacent said lower end.

5. The invention of claim 4 wherein each of said first and second ohmic
contact members comprises a body portion terminating in a curved outer
end extending outwardly of said spine.

6. The invention of claim 4 wherein each of said first and second ohmic
contact members comprises a housing having an inner volume, a ball
contact movably received in said inner volume, and a bias spring captured
between said ball contact and said housing for biasing said ball contact
in an outward direction.

7. The invention of claim 1 wherein said binder identification signal
comprises a binder address unique to the associated binder; and wherein
said binder identification circuit includes an addressable decoder.

8. The invention of claim 1 wherein said binder identification signal
comprises an r.f. signal having a frequency unique to the associated
binder; and wherein said binder identification circuit includes a crystal
having a resonant frequency equal to the frequency unique to said
associated binder.

9. The invention of claim 1 wherein said visible indicator comprises an
LED.

10. In combination: a storage cabinet for a plurality of searchable
binders, said cabinet having an upper shelf and a lower shelf, said upper
shelf having a lower surface, said lower shelf having an upper surface; a
first ohmically conductive member mounted on said lower surface of said
upper shelf; a second ohmically conductive member mounted on said upper
surface of said lower shelf, said first and second ohmically conductive
members being adapted to receive binder identification signals from a
source; and a searchable binder adapted to be removably received on said
lower shelf, said binder comprising a binder body having a front cover, a
rear cover, and a spine joining said front cover and said rear cover; a
binder mechanism mounted in the interior of said binder body; a visible
indicator mounted on said binder body in a position visible from the
outside of the binder when said binder is installed on said lower shelf;
first and second ohmic contact members carried by said binder body and
having contact portions extending partially externally of said binder
body for ohmic engagement with said first and second ohmically conductive
members when said binder is installed on said lower shelf so that a
binder identification signal present on at least one of said first and
second ohmically conductive members is transferred to at least one of
said first and second ohmic contact members; and a binder identification
circuit mounted on said binder body and coupled to said first and second
ohmic contact members and said visible indicator for activating said
visible indicator when a received binder identification signal designates
said binder as a sought binder.

11. The combination of claim 10 wherein said visible indicator is mounted
on said spine.

12. The combination of claim 10 wherein said spine has an inner surface
terminating in an upper end and a lower end; and wherein first ohmic
contact member is mounted on said inner surface of said spine adjacent
said upper end and said second ohmic contact member is mounted on said
inner surface of said spine adjacent said lower end.

13. The combination of claim 12 wherein each of said first and second
ohmic contact members comprises a body portion terminating in a curved
outer end extending outwardly of said spine.

14. The combination of claim 12 wherein each of said first and second
ohmic contact members comprises a housing having an inner volume, a ball
contact movably received in said inner volume, and a bias spring captured
between said ball contact and said housing for biasing said ball contact
in an outward direction.

15. The combination of claim 10 wherein said binder identification signal
comprises a binder address unique to the associated binder; and wherein
said binder identification circuit includes an addressable decoder.

16. The combination of claim 10 wherein said binder identification signal
comprises an r.f. signal having a frequency unique to the associated
binder; and wherein said binder identification circuit includes a crystal
having a resonant frequency equal to the frequency unique to said
associated binder.

17. The combination of claim 10 wherein said visible indicator comprises
an LED.

18. The combination of claim 10 further including a visible indicator
mounted on at least one of said upper and lower shelves for visually
indicating the presence of a sought binder on one of said shelves.

19. The combination of claim 10 further including an audible indicator
mounted on at least one of said upper and lower shelves for audibly
indicating the presence of a sought binder on one of said shelves.

Description:

BACKGROUND OF THE INVENTION

[0001] This invention relates to documents management in general, and in
particular to an improved documents management technique using a set of
searchable binders.

[0002] In medical records, legal and business offices, and some homes,
notebook binders (hereinafter "binders") are typically used to store
documents used for medical, legal, other business and personal purposes.
A typical binder has a front cover, a rear cover and a spine joining the
two covers. Inside the binder, a multi-ring manually operable binder
mechanism having two or more two-piece arcuate rings is permanently
mounted to facilitate insertion, storage and removal of documents having
a number of holes formed along a mounting edge, with the number of holes
corresponding to the number of rings of the binder mechanism. Each binder
is typically removably supported on a shelf by placing the bottom edges
of the binder covers and spine of a closed binder on the top surface of
the supporting shelf. Several binders are typically installed on a given
shelf, and several shelves are typically incorporated into a shelf
support structure, such as a cabinet. In order to enable the documents
contained in the various binders to be readily accessed, some type of
documents management system is necessary.

[0003] Documents management is typically performed by binder management.
Each document is initially assigned to, and placed in, an identified
binder dedicated to documents of a particular subject matter (e.g.,
"utility bills for a specific account"). Later-generated related
documents are typically assigned to and placed in this same binder. When
a binder is filled to capacity by documents, a new binder is provided for
receiving additional documents of the same category.

[0004] Binder management is typically conducted by providing each binder
with a label in a location (usually somewhere on the spine of the binder)
in which the label is visible when the binder is stored on a shelf. The
label contains readable information describing the content of the binder.
The readable information is typically a short form of identification,
such as an account name, a subject name (e.g., "Bank Statements") or the
like.

[0005] In order to provide ready access to the individual documents
contained in the binders, some type of indexing arrangement is normally
used to identify the location of each binder. A simple technique commonly
employed is a manually prepared master list of all binders in the binder
management system referencing each binder by the label information and
noting the shelf and cabinet location of each binder. In large
installations, more sophisticated indexing arrangements are used, such as
a computer-based index listing all binders by a short form identifier and
a corresponding enlarged and more thorough description of the binder
contents. Even such computer-based arrangements still require the use of
a readable label on each binder in order to identify a given binder to a
user. This is highly undesirable, since it facilitates the search by any
unauthorized user for a specific binder name or for a binder containing
information of a particular type. Nevertheless, known binder management
systems require the use of visible labels in order for the binders to be
reasonably locatable.

[0006] In those applications in which several individuals have access to
the binders, some arrangement is usually made to monitor the disposition
of the binders. For example, in a business application, it is convenient
and sometimes necessary to provide a sign out and return procedure so
that the whereabouts of a given binder will always be known. Usually,
such monitoring attempts fail to accurately track the binders because of
the failure of individuals to faithfully follow the procedure.
Consequently, at any given time, the integrity of the binder management
system can only be verified by actually looking through each shelf and
comparing the binders and their contents with the master index. This
requirement is both time-consuming and burdensome, and thus a severe
disadvantage.

[0007] In known binder management systems of the type described above,
once a binder is provided with a contents identifier, that binder is
permanently associated with the nature of its contents. To change the
contents to some other category, the binder must either be thrown away
and a new, unmarked binder substituted in its place, or the
identification label must be changed. In addition, the master index must
be up-dated, either manually or by using the computer in a computer-based
indexing system. These procedures are not always followed by office
personnel, and the integrity of the binder system is consequently
compromised.

[0008] In all examples of known binder management systems, the binders are
usually provided with some type of human readable or machine readable
identification indicia, such as the label affixed to the spine of each
binder. In more sophisticated systems, a computer is used to assist in
keeping track of the binders. When a binder is removed from the usual
location, some procedure is typically available to note the fact that
that binder has been removed from its normal location. This procedure
normally relies on either manual entry of the change into the system
computer by an operator, or the use of label reading devices (e.g., bar
code readers) to enter the information into the system computer.
Unfortunately, not all users follow the binder tracking procedure
faithfully and the result is that many binders can be missing from their
assigned shelf positions at any given time.

[0009] A further disadvantage with known binder management systems lies in
the fact that it is unnecessarily time-consuming to visually locate a
sought binder even if that binder is in its proper location. The user
must visually scan the spine label of each binder on a given shelf in a
given cabinet until the sought binder is visually identified by the label
information. If the sought binder has been previously misplaced on the
wrong shelf of the same cabinet, the user must then visually scan all
binders on the other shelves of that same cabinet until the sought binder
is visually identified. If, after visually scanning all binders on all
shelves of the same cabinet, the sought binder has not been found the
user has no other recourse than to continue the visual scanning process
on binders on shelves in the other cabinets in the binder storage area
until the sought binder is located or all binders on all shelves of all
cabinets in the binder storage area have been visually scanned and the
sought binder has still not been located.

SUMMARY OF THE INVENTION

[0010] The invention comprises a searchable binder suitable for use in a
binder management system which is devoid of the above-noted disadvantages
and which enables quick and efficient location of binders in a document
management system.

[0011] From an apparatus standpoint, the invention comprises a searchable
binder for use in a binder management system, the binder comprising:

[0012] a binder body having a front cover, a rear cover and a spine
joining said front cover and said rear cover;

[0013] a binder mechanism mounted in the interior of said binder body,
preferably on an inner surface of the rear cover;

[0014] a visible indicator, such as an LED, mounted on the binder body in
a position visible from the outside of the binder, preferably the spine;

[0015] first and second ohmic contact members carried by the binder body
and having contact portions extending partially externally of the binder
body for receiving a binder identification signal from a source; and

[0016] a binder identification circuit mounted on the binder body and
coupled to the first and second ohmic contact members and the visible
indicator for activating the visible indicator when a received binder
identification signal designates that binder as a sought binder.

[0017] The spine has an inner surface terminating in an upper end and a
lower end; and the first ohmic contact member is preferably mounted on
the inner surface of the spine adjacent the upper end and the second
ohmic contact member is preferably mounted on the inner surface of the
spine adjacent the tower end.

[0018] In a first embodiment, each of the first and second ohmic contact
members comprises a body portion terminating in a curved outer end
extending outwardly of the spine. In a second embodiment, each of the
first and second ohmic contact members comprises a housing having an
inner volume, a ball contact movably received in the inner volume, and a
bias spring captured between the ball contact and the housing for biasing
the ball contact in an outward direction.

[0019] In a first embodiment, the binder identification signal comprises a
binder address unique to the associated binder; and the binder
identification circuit includes an addressable decoder. In a second
embodiment, the binder identification signal comprises an r.f. signal
having a frequency unique to the associated binder; and the binder
identification circuit includes a crystal having a resonant frequency
equal to the frequency unique to the associated binder.

[0020] From a combination standpoint, the invention comprises a storage
cabinet for a plurality of searchable binders, the cabinet having an
upper shelf and a lower shelf, with the upper shelf having a lower
surface and the lower shelf having an upper surface;

[0021] a first ohmically conductive member mounted on the lower surface of
the upper shelf;

[0022] a second ohmically conductive member mounted on the upper surface
of the lower shelf, the first and second ohmically conductive members
being adapted to receive binder identification signals from a source; and

[0023] a searchable binder adapted to be removably received on the lower
shelf, the binder comprising a binder body having a front cover, a rear
cover, and a spine joining the front cover and the rear cover; a binder
mechanism mounted in the interior of the binder body, preferably on an
inner surface of the rear cover; a visible indicator such as an LED
mounted on the binder body in a position visible from the outside of the
binder when the binder is installed on the lower shelf, preferably on the
spine; first and second ohmic contact members carried by the binder body
and having contact portions extending partially externally of the binder
body for ohmic engagement with the first and second ohmically conductive
members when the binder is installed on the lower shelf so that a binder
identification signal present on at least one of the first and second
ohmically conductive members is transferred to the first and second ohmic
contact members; and a binder identification circuit mounted on the
binder body and coupled to the first and second ohmic contact members and
the visible indicator for activating the visible indicator when a
received binder identification signal designates that binder as a sought
binder.

[0024] The spine has an inner surface terminating in an upper end and a
lower end; and the first ohmic contact member is mounted on the inner
surface of the spine adjacent the upper end and the second ohmic contact
member is mounted on the inner surface of the spine adjacent the tower
end.

[0025] In a first embodiment each of the first and second ohmic contact
members comprises a body portion terminating in a curved outer end
extending outwardly of the spine. In a second embodiment, each of the
first and second ohmic contact members comprises a housing having an
inner volume, a ball contact movably received in the inner volume, and a
bias spring captured between the ball contact and the housing for biasing
the ball contact in an outward direction.

[0026] In a first embodiment, the binder identification signal comprises a
binder address unique to the associated binder, and the binder
identification circuit includes an addressable decoder. In a second
embodiment, the binder identification signal comprises an r.f. signal
having a frequency unique to the associated binder, and the binder
identification circuit includes a crystal having a resonant frequency
equal to the frequency unique to the associated binder.

[0027] The combination may further include a visible indicator mounted on
at least one of the upper and lower shelves for visually indicating the
presence of a sought binder on one of the shelves.

[0028] Similarly, the combination may further include an audible indicator
mounted on at least one of the upper and lower shelves for audibly
indicating the presence of a sought binder on one of the shelves.

[0029] When a binder is being sought, an operator may enter the
appropriate binder information into a host computer, which can perform a
table look-up for the binder identification information-i.e. address or
crystal frequency, and transmit this information to all binder cabinets.
When a binder identification signal is matched to a binder by the binder
identification circuit, the visible indicator on the corresponding binder
is activated and the user can visually identify the binder being sought.
In addition, for large or brightly lit binder storage areas the shelf
visible indicators and the optional shelf audible indicators assist the
user in locating the sought binder.

[0030] For a fuller understanding of the nature and advantages of the
invention, reference should be made to the ensuing detailed description
taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0031]FIG. 1 is a perspective view of a binder according to the
invention;

[0032] FIG. 2 is a plan view of the binder of FIG. 1 in the opened
position;

[0033]FIG. 3 is a perspective view of a pair of multiple-shelf binder
storage cabinets;

[0034]FIG. 4 is an enlarged partial front schematic view of a portion of
a binder storage cabinet illustrating a removable contact arrangement and
electrical components;

[0035]FIG. 5 is an enlarged partial front view of a portion of a cabinet
shelf illustrating another removable contact arrangement;

[0036]FIG. 6 is a schematic view further illustrating the contact
arrangement of FIG. 5;

[0037] FIG. 7 is a schematic view of a first binder identification circuit
using an addressable decoder;

[0038]FIG. 8 is block diagram illustrating the binder location technique
used in conjunction with the first binder identification circuit;

[0039]FIG. 9 is a schematic view of a second binder identification
circuit using a crystal resonant at a unique frequency;

[0040] FIG. 10 is a view similar to FIG. 4 illustrating the local
electrical components used with the second binder identification circuit;
and

[0041] FIG. 11 is a block diagram illustrating the binder location
technique used in conjunction with the second binder identification
circuit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] Turning now to the drawings, FIGS. 1 and 2 illustrate a single
binder according to the invention. As seen in these Figs., a binder 10
has a front cover 12, a back cover 14 and a spine 15 joining the front
and back covers 12, 14. A conventional multi-ring manually operable
binder mechanism 16 having a plurality (3 illustrated) of two-piece
arcuate rings 18 is permanently mounted to the inner face of rear cover
14 to facilitate insertion, storage and removal of documents having a
number of holes formed along a mounting edge, with the number of holes
corresponding to the number of rings 18 of the binder mechanism 16.
Mounted on the inner surface of spine 15 are a binder identification
circuit 20 (described more fully below) carried by a substrate 20a, a
pair of ohmic conductors 21, 22, an upper ohmic contact 24, a lower ohmic
contact 25, and a visible indicator 27, preferably an LED. Visible
indicator 27 is mounted in an opening formed in spine 15 so as to be
visible from the outer side of binder 10. Upper and lower ohmic contacts
24, 25 are arranged on spine 15 in a position extending slightly above
and below the upper and lower margins of spine 15 as shown. In the
embodiment shown in FIGS. 1 and 2, each ohmic contact 24, 25 is a spring
contact having a curved engagement portion 28 to promote sliding
engagement with conductive strips described below which are carried by
binder support shelves. This arrangement enables the upper and lower
ohmic contacts 23, 25 to ohmically engage conductive strips mounted on
the shelves described below on which the binder can be removably stored.

[0043]FIG. 3 is a perspective view of a pair of multiple-shelf storage
cabinets designed for use with the binder 10 of FIGS. 1 and 2. As seen in
this Fig., each storage cabinet 30a, 30b has a plurality (2 illustrated)
of storage shelves 31, 32 and a top shelf 33. A plurality of binders
10-1, 10-2, 10-N are removably received on a given shelf 31, 32. Each
shelf 31, 32 has an associated visible indicator 35, preferably an LED;
and an optional audible indicator 36, such as a type AT-1220-TT-R
available from PUI Audio, Inc. of Dayton, Ohio, for a purpose to be
described. Mounted on an appropriate portion of the pair of storage
cabinets 30a, 30b is a unit 38 containing a local microcomputer and a
conventional wireless transponder (Wifi unit) capable of sending and
receiving information to and from a host computer.

[0044]FIG. 4 is an enlarged partial front schematic view of that portion
of binder storage cabinet 30b including top shelf 33 and middle shelf 31
and illustrating a removable contact arrangement and associated
electrical components. As seen in this Fig., a first laterally extending
ohmically conductive strip 41 is mounted to the undersurface of top shelf
33, and a second laterally extending ohmically conductive strip 42 is
mounted to the top surface of underlying shelf 31. The position of each
conductive strip 41, 42 is chosen such that the upper and lower contacts
24-i and 25-i of binders 10-i will engage the conductive strips 41, 42 so
as to make ohmic contact therewith whenever a binder 10-i is installed on
underlying shelf 31. Essentially similar ohmically conductive strips are
mounted to the undersurface of shelf 31 and the top surface of shelf 32
to provide this same conductive capability. A local cabinet microcomputer
(MCU) 45, such as a type AT89C2051 device available from Intel
Corporation of Santa Clara, Calif. or a type LPC 1766 available from NXP
Semiconductors of Eindhoven, The Netherlands, has a data output terminal
43 coupled to upper conductive strip 41 and an input terminal 44 coupled
to lower conductive strip 42. As denoted by the lead lines and legends of
FIG. 4, other input and output paired terminals are coupled to the
conductive strips 41, 42 of the other shelf combinations. MCU 45 also has
other paired input/output terminals labeled "Shelf 1/LED/Buzzer, Shelf
2/LED/Buzzer, . . . , Shelf N/LED/Buzzer" in FIG. 4 which are coupled to
the visible indicators 35 and optional audible indicators 36 of each
shelf pair. MCU 45 is also coupled by means of the wireless transponder
noted above to a host computer as denoted by the legend "To Computer". As
will now be apparent, when a binder 10-i having ohmic spring contacts
24-i, 25-i is installed on a shelf, these ohmic spring contacts 24-i,
25-i will engage the corresponding one of conductive strips 41, 42.

[0045] FIGS. 5 and 6 illustrate an alternate form of ohmic contact for
binders 10-i. For conciseness, MCU 45 is not illustrated in these Figs.
As seen in these Figs., spring contacts 24, 25 are replaced by captured
ball and spring units 50, 51 mounted in a binder 10 adjacent the upper
and lower margins thereof. Each ball and spring unit includes an
ohmically conductive ball 53 and a compression spring 54 captured in a
housing 55. The ball 53 in the upper spring unit 50 is ohmically
connected to one terminal of binder identification circuit 20 via
conductor 21, while the ball 53 in the lower spring unit 50 is ohmically
connected to the other terminal of binder identification circuit 20 via
conductor 22. The ohmic connections between ball 53 and conductors 21, 22
may be made via housing 55 or spring 54 or both. In use, when a binder 10
is installed on a cabinet shelf, the conductive strips 41, 42 engage the
balls 53, slightly compressing the springs 55, and ensuring effective
ohmic contact.

[0046] FIG. 7 is a schematic view of a first binder identification circuit
using an addressable decoder circuit. As seen in this. Fig., upper
contact 24 is ohmically connected to an address input IN of an address
decoder chip 60 which has a unique address hard wired therein by means of
address input terminals A0-A7. Address decoder chip 60 is preferably a
type PT2272 address decoder available from Princeton Technology Corp. of
Taipei, Taiwan. Upper contact 24 is also coupled via a diode 62 to a
storage capacitor 63 to provide D.C. power to chip 60 whenever there is
an incoming address signal from MCU 45. As shown in FIG. 4, contact 24 is
also coupled to an output terminal of MCU 45. When MCU 45 supplies a
multi-bit address to contact 24, this information is serially coupled to
the IN input of address decoder chip 60 and compared with the address
hard-wired into decoder chip 60. If the incoming address matches the
hard-wired address, decoder chip 60 outputs a signal on terminal VT which
activates LED 27. The activation of visible indicator 27 causes D.C.
current to flow through indicator 27 and back to MCU 45 via contact 25
and the return path shown in FIG. 4. This current flow is sensed by MCU
45, which then activates the shelf LED 35 and optional audible indicator
36 for the shelf on which the binder 10-i having the matched address
decoder chip 60 is located. MCU 45 also transmits a "Found" signal to the
host computer when an address match has been detected.

[0047]FIG. 8 is block diagram illustrating the binder location technique
used in conjunction with the first binder identification circuit of FIG.
7. As seen in this Fig., the process begins with an operator turning on
the host computer in flow block 81. Thereafter, in block 82 the operator
enters the system identification of a binder or a document stored in a
binder. Next, the host computer searches the system database for the
serial number of the specified binder or the serial number of the binder
containing the specified document (block 83). Once the binder serial
number has been located, the host computer generates the corresponding
address code of the binder to be found (block 84). This code matches the
code hard-wired into the decoder chip 60 contained in the binder to be
found. This address code is then broadcast to all MCUs 45 in the system
(block 85). Each MCU 45 then outputs the received address code to the
code conductor 41 for each shelf and awaits a positive response from one
of the decoder chips (block 86). If an MCU 45 senses a positive response
(current flowing through one of the visible indicators 27), MCU 45 then
activates the corresponding shelf LED 35 and optional buzzer 36 (block
87) and generates a "Found" signal which is then transmitted to the host
computer by the Wifi unit in unit 38 (block 88). The operator can then
look around the binder storage area for the shelf with the activated
shelf LED 35, proceed to that shelf and look for the binder with the
activated LED 27. If the optional audible indicator 36 is provided
(typically for a relatively large binder storage area or a brightly lit
area), the operator may proceed in the direction of the audible sound
until the illuminated shelf LED 35 is visually located.

[0048] The integrity of the entire collection of binders 10-i can be
quickly checked by operating the host computer in the sweep address mode.
As the addresses are swept over the entire range of possible addresses,
all binder identification circuits 20 which are operationally present in
the collection of cabinets will respond by activating the corresponding
binder LED 27 and this will be detected by the corresponding single board
computer 45 and a "Found" signal will be transmitted back to the host
computer. The address of any missing or non-functioning binder
identification circuit 20 will not result in the generation of a "Found"
signal, and this lack of response will be detected by the system host
computer. This absence of an operational binder identification circuit 20
of a given specific address can be correlated by the system host computer
to the binder identification in the system host computer by noting the
addresses of the non-responsive binder identification circuits.

[0049]FIG. 9 is a schematic view of a second binder identification
circuit using a single unique frequency crystal. As seen in this Fig.,
upper contact 24 is ohmically connected to a first terminal of a crystal
91 having a resonant frequency. The other terminal of crystal 91 is
coupled to the anode terminal of LED 27. The cathode of LED 27 is coupled
to lower contact 25. When an r.f. signal having a frequency of the
crystal is applied across the two crystal terminals, the crystal will
resonate and current will flow through the LED 27 thereby illuminating
same. The crystal 91 in each binder identification circuit has a resonant
frequency which is unique and different from the crystal 91 in all the
other binder identification circuits in the system, and the host computer
contains a master list of crystal frequencies correlated by serial number
to the individual binders 10-i.

[0050] FIG. 10 is an enlarged partial front schematic view of a portion of
a binder storage cabinet illustrating a removable contact arrangement and
the electrical components employed with the crystal circuit of FIG. 9. As
seen in this Fig., the ohmic conductive strips 41, 42, shelf visible
indicator 35, and optional shelf audible indicator 36 are essentially
arranged in the same physical manner as the arrangement of FIG. 4
described above. However, MCU 45 does not supply data to conductive strip
41 in the FIG. 10 embodiment. Instead, an R.F. generator 93 is provided
which has a pair of r.f. signal terminals 94, 95 coupled to upper
conductive strip 41 and lower conductive strip 42 of each shelf pair in a
given cabinet. R.F. generator 93 is a conventional device capable of
generating single frequency r.f. signals over a predetermined range of
permitted frequencies, e.g 2-20 mHz, in response to receipt of a desired
frequency instruction signal from the host computer. MCU 45 does control
the operation of the shelf visible indicators 35 and optional shelf
audible indicators 36 in response to the receipt of a signal from R.F.
generator 93 indicating that the crystal having the desired frequency is
resonating in one of the binder identification circuits on a given shelf.

[0051] FIG. 11 is block diagram illustrating the binder location technique
used in conjunction with the second binder identification circuit of FIG.
9. As seen in this Fig., the process begins with an operator turning on
the host computer in flow block 101. Thereafter, in block 102 the
operator enters the system identification of a binder or a document
stored in a binder. Next, the host computer searches the system database
for the serial number of the specified binder or the serial number of the
binder containing the specified document (block 103). These steps are
essentially the same as steps 81-83 in FIG. 8. Once the binder serial
number has been located, the host computer generates the corresponding
frequency code of the binder to be found (block 104). This frequency
matches the frequency of the crystal in the binder identification circuit
contained in the binder to be found. This frequency code is then
broadcast to all R.F. generators 93 in the system (block 105). Each R.F.
generator 93 then generates an r.f. signal of the desired frequency for
all of the shelf pairs in the associated cabinet (block 106). If the
binder identification circuit having the crystal of the specified
frequency is located on one of the shelves in the cabinet, the crystal
will resonate and the corresponding LED 27 will turn on (block 107). This
condition is sensed by the R.F. generator 93 in the cabinet containing
the binder identification circuit with the resonating crystal, and the
condition is reported by the R.F. generator 93 to the MCU 45. In
response, the MCU 45 activates the visible shelf indicator 35 and
optional audible shelf indicator 36 for the shelf containing the sought
binder 10-i (block 108), and generates a "Found" signal which is then
transmitted to the host computer by the Wifi device in unit 38 (block
109). The operator can then look around the binder storage area for the
shelf with the activated shelf LED 35, proceed to that shelf and look for
the binder with the activated LED 27. If the optional audible indicator
36 is provided (typically for a relatively large binder storage area or a
brightly lit area), the operator may proceed in the direction of the
audible sound until the illuminated shelf LED 35 is visually located.

[0052] The R.F. signal generator 93 in each cabinet may comprise a sweep
frequency generator capable of generating R.F. signals in a swept mode,
beginning with the first crystal resonant frequency in the binder
management system, and ending with the last crystal resonant frequency in
the system. With such a signal generator, the integrity of the entire
collection of binders can be quickly checked by instructing the R.F.
signal generator 93 to operate in the sweep mode. As the signal
frequencies are swept over the entire range, all binder identification
circuits which are present in a given cabinet will resonate at their
respective frequencies and this can be detected by the microcomputer unit
45 in each cabinet using a conventional R.F. detector circuit. Any
missing binder will not respond, and this also can be detected by the
microcomputer unit 45 in each cabinet using the same circuit. Any binder
detected as missing can be reported by a given microcomputer unit 45 in
each cabinet to the system host computer and correlated by the system
host computer to the binder identification in the computer by noting the
frequencies of the non-responsive binder identification circuits.

[0053] The system may be initially configured for the binders in several
different ways. The most fundamental way is to place a single binder 10
onto a shelf in a cabinet, cause the cabinet R.F. signal generator 93 to
sweep the range of permitted frequencies, note the frequency at which the
crystal in that binder resonates, enter that frequency number into a list
in the microcomputer unit 45 memory, remove the binder, insert another
binder 10, and repeat this process for all binders desired on a serial
basis. Once all binders have been processed, appropriate binder
identification information is transmitted from microcomputer unit 45 of a
given cabinet to the system host computer. This method works well for a
new system with no existing binders and a relatively small number of
binders required initially. A more useful technique is to insert a first
binder onto a shelf, sweep the permitted R.F. frequencies, note the
resonant frequency of the crystal in that binder, enter that number into
a new list; insert a second binder onto the shelf without removing the
first, sweep the frequencies, add the resonant frequency of crystal in
the new binder to the list; insert a third binder onto the shelf, sweep
the frequencies, add the resonant frequency of the crystal in the third
binder to the list; etc. As each new binder is inserted onto the shelf,
the microcomputer unit 45 has a running list of frequencies already
identified and, since each crystal frequency is unique, there can be no
duplications.

[0054] The system using addressable decoder circuits described above may
be initially configured in a similar manner to that discussed above in
connection with the R.F. binder identification circuit using single
crystals of unique frequencies. The essential difference is that, instead
of employing a swept frequency technique, a swept address technique is
employed. For this technique, the host computer sequentially generates
the entire set of permissible addresses in the system, notes the response
from each MCU 45 in the system, and correlates this with the binder
identification information.

[0055] The binder management system described above affords several
advantages over known binder management systems. Firstly, a given binder
can be quickly located in a binder storage area without the need to
visually inspect all binder labels until the sought binder is located.
Also, the integrity of the binder management system can be thoroughly
tested remotely to find misfiled binders and to identify binders missing
from the system.

[0056] Although the above provides a full and complete disclosure of the
preferred embodiments of the invention, various modifications, alternate
constructions and equivalents will occur to those skilled in the art. For
example, white the invention has been described with reference to
specific R.F. frequencies, other frequencies may be employed, depending
on the preferences of the system designer. In addition, while the
conductive strips 41, 42 have been shown as laterally disposed along the
shelves, each strip may be configured as a plurality of interconnected
strip portions extending inwardly of the associated shelf surface and
laterally spaced by a predetermined amount. In such a variation, contacts
24, 25 may have a groove formed therein to provide positive engagement
with the conductive strip portions in order to afford more mechanical
stability for the binders and predetermined lateral spacing for the
binders. In addition, while binder mechanism 16 has been described and
illustrated as being mounted on the inside surface of back cover 14, it
may be mounted on the inside surface of the front cover 12, if desired,
or on the inside surface of the spine 15. If mounted on the inside
surface of spine 15 care should be taken that the usually conductive
binder mechanism is electrically isolated from elements 20, 20a, 21, 22,
24, 25, 27, and 28. Further, the invention may be used to manage a binder
management system of many cabinets positioned at different physical
locations using an internal or an external computer network, if desired.
Therefore, the above should not be construed as limiting the invention,
which is defined by the appended claims.